Miter-box



UNITED STATES PATENT OFFICE.

H. B. NASH, OF SANDY HILL, NEv YORK, ASSIGNOR TO A. B. KING, OF TROY,NEW YORK.

MITER-BOX.

Specification of Letters Patent No. 30,027, dated September 11, 1860.

To aZZ whom it may concern:

Be it known that I, H. B. NASH, of Sandy Hill, in the county ofWashington and State of New York, have invented a new and ImprovedMiter-Box; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to theaccompanying drawing, forming a part of t-his description, in whichFigure l, represents a transverse vertical section of my invention theline m a: Fig. 2, indicating the plane of section. Fig. 2, is a lan ortop view of the same. Fig. 3, is a front elevation of one of the gates.

Similar letters of reference in the three figures indicate correspondingparts.

To enable those skilled in the art to make and use my invention, I willproceed to describe its construction, and operation withreference to thedrawing.

The platform A which serves to support the stuff to be cut rests on thestandards B which are firmly secured to the bed plate O. Fastened to thebed plate O, by means of a pivot a, is the angular arm D and thehorizontal port-ion f* of this arm sweeps over the half-circular slottedguide plate E, which is iirmly bolted down to the platform O. Screws andnuts serve to set the arm D, to any point in the plate E, so that it canbe adjusted to the desired angle. Another arm D', similar to the arm D,and bent at right angles in the same manner as the latter, is made toslide on its horizontal portion f'*, being guided by a section c,litting in slots fZ, tZ', in the horizontal parts of both arms, and bygrooves in the horizontal portion fi, of the arm D, forming guides forcorresponding ways on the under side of the horizontal portion f'* ofthe arm D'. By these means the upright portions of the arms D, D', canbe brought farther apart or closer together, as the nature of the stuffto be sawed may require, and at the same time both arms turn together onthe half circular guide plate E.

The ends of the guide plate E, are provided, with adjustable stops'e',which arrest the arms D, D', at angles of 45o on either side, and a markin the center of the guide-plate assists in adjusting the arms D, D', toan angle of 90". The upright portion of each of the arms D, D', is madeof two parts f', and g, which are screwed to gether by screw pivots n,thus allowing the upper parts g, to turn freely and to be set to anydesired angle. In order to arrest the arms g, when they are in avertical position, shoulders z', are provided which by striking againststops j, on the lower parts j', prevent the arms g, being turned anyfarther than necessary to bring them in a vertical position and othershoulders on the opposite side of the arms g, by striking against stopsj', on the lower parts f, arrest the arms, at an inclina-tion of 45degrees, it being most common to cut the stuff at angles of 900 or of45. But it will be easily understood how the arms can be adjusted bymeans of screws Z1. at any desired inclination between 450 and 900. Eachof these arms is furnished with two gates 7c which form the guides forthe saw. The upper portion of these gates is enlarged so as to admit theback of the saw, and the lower portion of these gates form either acontinuous bearing for the saw blade as shown at Z or steel pins C, areinserted into the inner edges of said gates to form the guides for thesaw blade. I prefer the latter arrangement as it creates less frictionthan a continuous bearing Z.

The gates are made out of two halves which can be moved farther apart orbrought closer together to suit dierent thicknesses of blades and the-gates are guided between the arms g, andv adjustable plates m, whichare set, to the desired distance apart by means of set screws. When thusadjusted the gates are allowed to move up and down freely, the back ofthe saw serving to raise or depress the same, while the blade is alwaysguided perfectly between the bearings Z, or between the guide pins Z'.

By these means any thickness of stuft' may be cut to any angle between90o and 450 in either direction, and as the teeth of the saw do not comein contact with the bearings Z, or with the steel pins Z', there is nodanger of spoiling the cutting edge of the saw, and i the sliding pvotedarms D, D, and adjustthe gates Will always preserve the Width able guidegates la, 7c, as and for the purpose to Which they have been adjusted.herein shown and described.

What I claim as new and desire to secure H. B. NASH. 5 by Letters Patents: Witnesses:

Y' The arrangement of the sliding oscllat- U. Gr. TAMS,

ing adjustable arms g, g, and parts f, f, With EDGAR HULL.

